PBT (polybutylene ketone) keycaps and ABS (acrylonitrile-butadiene-styrene) keycaps are two common keycap materials in mechanical keyboards, each with different characteristics and advantages and disadvantages
Abrasion resistance: PBT keycaps have higher abrasion resistance, and they are not easy to shine after a long period of use.
Feel: PBT keycaps usually offer a rougher feel, giving a better tactile feel.
Temperature resistance: PBT material has high temperature resistance and is not easy to be deformed due to high temperature.
Color and light transmission: PBT keycaps are usually saturated in color, but they are less transparent than ABS keycaps, so PBT keycaps may not be the best choice for backlit keyboards.
*: PBT keycaps are usually more expensive than ABS keycaps due to the difficulty and cost of manufacturing.
Gloss: ABS keycaps are prone to wear and shine after prolonged use, which is known as the "shiny" phenomenon.
Feel: ABS keycaps are smoother and may feel more comfortable for some users.
Temperature resistance: The temperature resistance of ABS material is not as good as that of PBT, and it is easier to deform at high temperatures.
Color and light transmission: The color of ABS keycaps may not be as saturated as PBT, but they have better light transmission and are suitable for backlit keyboards.
ABS keycaps are cheaper to manufacture and therefore cheaper.
The choice between PBT and ABS keycaps depends mainly on personal preference and usage needs. If you're looking for durability and feel and don't care much about backlight transmission, then PBT keycaps may be a better choice. Conversely, if you like a sleek feel, or have backlight needs, and don't mind how "shiny" keycaps might be over time, then ABS keycaps may be better for you. **It is also one of the factors to consider when choosing.
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